Chelsea boss Jose Mourinho was in joyful mood after the club's draw away to Arsenal, making jibes in the Gunners' direction.
The Blues secured a 0-0 draw at The Emirates to move to within just six points of securing the Premier League title.
Quizzed about the home fans booing his Chelsea side, Mourinho hit back sharply by suggesting they were in fact making their feelings known at Arsene Wenger's choice of substitution.
He claimed, as quoted by Goal, that the decision to bring off Olivier Giroud was too cautious a move.
"Maybe they were not singing to us. When you are playing at home and take your No.9 off ... maybe they wanted to see Giroud and Welbeck together."
The pair did get some game time together, with Welbeck brought on in the 76th minute for Francis Coquelin, a real sign of attacking intent from Arsene Wenger. Giroud was substituted on 84 minutes for Theo Walcott.
Giroud was having little success against a John Terry led Chelsea defence, not for the first time. He had two shots at goal but did not manage any of them on target.
Wenger likely would have wanted to see if Walcott could use his pace to unlock Chelsea, allowing Welbeck to move into his preferred position.
It was not necessarily a terrible move from Wenger, but Jose Mourinho does not need any excuse to take a dig at his bitter rival, despite never being beaten by the Frenchman.